Mechanical movement



1. HETTRICH.

MECHANICAL MOVEMENT. APPLICATION FILED 050,15. 1919.

Patented Nov. 2, 1920.

Y 2 "I! 19 /6 ll 6 2' L. IIIEJ1 l y I 1 x I I I 9 i i I 6 l 14 I 26 h /6 I 7 anvantoz UNITED STATES JOHN HETTB-IOII, 0F LINCOLN, NEBRASKA.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed December 15, 1919. Serial No. 344,778.

To all to 7mm it may concern:

Be it known that 1, JOHN l-lnrrnion, a citizen of the United States, residing in the city of Lincoln, county of Lancaster, and State of Nebraska, have invented a new and useful lxlechanical Movement, and have described the same in the following specification, illustrated by the accompanying drawings.

Vly invention relates to that class of mechanical movements for the transmission of motion which individually comprise a driving-shaft, a countershaft, and intermediate mechanism for effecting engagements and disengagements between. these shafts. It is the main object of the invention to convert. uniform rotary motion of predetermined speed and angular extent, as exhibited in the partial rotation of the drivingshaft, into a gradually accelerated rotary motion of greater angular extent, as produced in the partial rotation of the countershaft. Incidentally it is an object of the invention to simplify and improve the mechanical movement which is the subject of my patent application No. 322,329, which was filed September 8, 1919. To accomplish these objects, I incorporate in my improved mechanical movement, as parts thereof, a supporting disk, or a pair of adjacent disks, normal to the countershaft and keyed thereto, a radially reoiprocable push-bar working between the disks, a bellcrank pivotally fulcrumed on the push-bar and having an arm pivoted to the disks, and a driving-pin which is carried and actuated by the driv- -ing shaft and adapted to engage the bellcrank and its push-bar.

In said drawings, illustrating the best manner in which I have contemplated applying the principles of the invention, Figure 1 is an elevation of a mechanical movement which is constructed in accordance with these principles. Fig. 2 is a section on the section line 2-2 of Fig. 1, and shows the mechanism as positioned at the commencement of the partial rotation contemplated. Fig. 3 is a similar section showing the parts of Figs. 2 as positioned relatively to each other at the end of said partial rotation.

In the illustrated specimen of my invention, the driving-shaft and the countershaft are denoted respectively by the numerals t and 5. Keyed on the shaft 4c is a spool, denoted generally by the numeral 2. It comprises tbc cylindrical spool body 6 and a pair of parallel end disks, or spool flanges, and 8, which are of equal diameters. in like manner the shaft 5 has keyed thereon the spool 3. The latter comprises the spool body 9 and the spool flanges, or disks, 10, duplicates of each other, which are approximately of the same size as the flanges 7 and 8, are in the same planes therewith, and are pnargmally near thereto, though not in conact.

The reciprocable push-bar which is above mentioned as an element of this mechanical movement, is the plate 12. It has a longitudinal slot 13, works in the space between the disks 10 and 11, and has an arm 14 extending slightly beyond the periphery of these disks. Relatively to the shaft 5, it is movable in a radial direction only, being guided by this shaft and by the sleeved pin 15 which occupy this slot.

The bellcrank of the movement, denoted by the numeral 16, is slotted, and is fulcrumed on the push-bar arm 141 by the pivot pin 17. It has an arm 18, terminally attached to the body of the push-bar by the tension spring 19, and is-mounted between the disks 10 and 11 on the marginal pivot-pin 20. Its other arm 21 extends into the space between the disks 7 and 8 for the purposes of engagement. The driving-pin of the movement is denoted by the numeral 22. It is seated in and interconnects the disks 7 and 8, near the periphery thereof, and has an antifriction sleeve or roller 23 for oontactual engagement with the push-bar arm 1% and with the antifriction roller orsleeve 25 which is carried on the pin 24 in the bellcrank.

During the time in which the described apparatus, being operatively impelled by the uniform rotatory movement of the shaft 41,

passes operatively from the position of parts which is shown in Figs. 1 and 2 to the position which is shown in Fig. 3, the centripetal movement of the push-bar, produced by the pressure of the pin 22 against the push-bar arm 1 1, overcomes the resistance of the spring 19 and turns the bellcrank pivotally both on the pin 17 and on the pin 20; and this movement of the bellcrank, increasing the distance between the pin 20 and the pin 22, forces these pins apart; whereby the peripheral movement of the spool 2, as com municated to the spool 3 through these pins is progressively increased while being so sci communicated. In this Way a uniform partial rotation of the driving shaft is converted into a gradually accelerated partial rotation of the countershaft, and this operation of the device may be repeated as often as the parts thereof are brought by any means into the relative positions shown in Figs. 1 and 2.

I claim as my invention- 1. A mechanical movement of the specified class, comprising a rotatable shaft, a support keyed thereon, a bellcrank connected with the support by a pivot-pin, a reciprocable push-bar connected With the bellcrank by a pivot-pin and by a spring and a driving-shaft carrying a contact member adapted to engage the push-bar and the bellcrank.

2. A mechanical movement of the speci fied class, comprising a countershaft, a support keyed thereon, a bellcrank having an multaneously to engage the bellcrank and the push-bar.

3. A mechanical movement of the specified class, comprising a spool having parallel flanges and keyed on a driving-shaft, a like spool keyed on a counter shaft, a radially reciprocable push-bar Working between the flanges on the countershaft, a bellcrank fulcrumed on the push-bar and pivotally attached to said flanges, and a driving-pin in the spool of the driving-shaft for engagement With the push-bar and With the bellcrank.

Witness my signature at Lincoln, Nebraska, December 9th, 1919.

JOHN HETTRICH. 

